BM818-A1:
FDD-LTE:B2/B3/B4/B5/B12/B13/B17/B25/B26/B66 TDD-LTE:B41(200M)
HSPA+/WCDMA:B2/B4/B5
GSM/GPRS/EDGE:B2/B5
https://www.broadmobi.com/en/module_show.php?id=18
Only band that modem supports in your market is B3 it looks like . Im guessing thats your problem .
Looks like you need BM818-E1
BM818-E1:
FDD-LTE:B1/B2/B3/B5/B7/B8/B20 TDD-LTE:B38/B40/B41(120M)
HSPA+/WCDMA:B1/B2/B5/B8
GSM/GPRS/EDGE:B2/B3/B5/B8
https://www.broadmobi.com/en/module_show.php?id=18
Now you just have to find one . I looked I couldnt . Maybe purism can sell you one ?